Samuel b



(N8 Model.) S. B. SMITH,

SAW MILL CARRIAGE. No. 376,050. Patented Jan. 3, 1888.

N. PETERS. PPPP unto n hu, Washington. 0. c4

UNITED STATES PATENT OFFICE.

SAMUEL B. SMITH, OF CINCINNATI, OHIO, ASSIGNOR TO SMITH, MYERS 87 VSGHNIER, OF SAME PLACE.

SAW-MILL CARRIAGE.

' SPECIFICATION forming part of Letters Patent No. 376,050. datedJanuary 3, 1888,

Application filed November 9, 1886. Serial No. 218,408. (No model.)

To all whom it may concern:

Be it known that I, SAMUEL B. SMITH, a resident of Cincinnati, in thecounty of Hamilton and Stateof Ohio, haveinvented certain new and usefulImprovements in Saw-Mill Carriages, of which the following is'aspecification. 7

My invention relates to an automatic mode of shifting a saw millcarriage laterally a slight distance away from the saw when it haspassedthe limit of the log to be sawed, and

just after the return movement, by means of mechanism, to bring it backto its original position, ready for asecond setting of the log by thehead-block.

The object of my invention is, first, to allow thelog and carriage to bemoved laterally after the out has been made by the saw without havingthe log come in contact with the teeth of the saw and causing it tochatter or vibrate on its return movement. This allows thecarriage to beretracted rapidly without dulling or injuring the set of the teeth andwithoutinj uring the lumber.

Another object is in movingthe log laterally away from the saw toprevent the liability of the back edge of the saw from catchingsplinters and tearing the lumber on the return or backward movement ofthe log and carriage, all of which will be fully set forth in the de-'scription of theaccompanying drawingsmnaking a part of thisspecification, in which Figurelis a longitudinal vertical section online a: 00, Fig. '2, of my improvement. Fig. 2 is a top plan View of myimproved carriage and shifting apparatus. Fig. 3 is a vertical tracks onwhich the carriage axles, and thereby shift the log away from the saw bythe following instrumentalities:

4 represents journal-boxes forming bearings for the axles 3.

5 represents saddles rigidly secured to thejournal-boxes4,andformingabaseon whichthe sills 6 rest and by which theyare supported 7 represents cross-girders rigidly attached to the sills6. a

8 represents a center sill. p

The axles 3 are adapted to move laterally in thejour'nabboxes. This isaccomplished by means of a screw-threaded sleeve, 9, and a sleeve-nut,10.

11 represents collars adjustably connected by set-screws to each of theaxles 3, and between which the sleeve-nut 10 moves. The screw-sleeve 9is held from lateral movement by means of the collars 11, and thesleevenut 10 is made sufficiently short to allow of the desired lateralmovement between the collars 11 and the crank-arms 12, each of which areprovided with crank-pins 13, which journal in a link, 14, pivoted uponcenters or studpins 15, which project laterally from the collars 16,that are rigidly secured to the shift-- ing-rod 17.

18 represents a coiled spring, one end of which seats against the collar19, that is attached to the cross-girders 7. 20 represents stop orcompressing collars which receive the outer ends of the spring 18.

21 represents an endless rope rigidly secured to the collars 20.

22 23 represent idler-pulleys at each end of the carriage, over whichthe rope 21 passes, and thence around a driving-pulley, 24. The carriageis moved or driven by this drivingpulley 24 and the rope 21. I

Mode, of operati0n.-The parts operate in the following manner: Thedriving-pulley 24 winds the rope 21 around it, as it is driven, anddraws the carriage-say first to the left for its forward movementuntilit has nearly reached the limit of its motion, when the spring 18strikes against the compressing-collar 20, which slackens the motion andcushions the stopping of the carriage, thereby taking off the shock orjar which would be caused bya sudden stop. As

the spring 18 commences to be retracted by the collar 20, theshittinga'od 17 is drawn by the contraction of the spring, and with itthe links 14: and cranks 12 are moved, thereby turning the threaded rod9 in the sleevenut 10. This movement of the screw-threaded collars 9 inone direction moves the sleeve-nutlO in the opposite direction, therebyimparting a lateral movement to the central sill, 8, and with it theentire carriage, which is supported by the journal-boxes Jr. of theaxles 3, so that the log and the carriage are bodily shifted laterallyon the axles 8 by the movement of the crank-arms 12 and links 14. \Vhenthe movement of the driving-pulley 24; is reversed say, to carry thecarriage backward read y for a second cutting of the logthe screws andcollars will work in a similar manner, pulling the shiftingrod 17 in theopposite direction, reversing the movement of the crank-arms 12 andlinks 14, and consequently bringing the carriage, slidin on the axles 3,back to its nor mal position ready for a second cutting.

I have not shown the methods of adjusting the collars 20 upon the. rope21, as this may be done by any well-known means of regulating theadjustment of the carriage to the movement of lateral play required.Neither have I shown the method of limiting the forward movement of thecarriage, as any wellknown means of stopping the movementby controllingthe number of revolutions of the driving-pulley 21 may be employed.

The means employed for guiding the carriage on the track are groovedtrucks A upon one side of the carriage, which tit a similarlyshapedrail, 1.

Another feature of my invention consists in the use of the adjustablecollars 11 to take up lost motion laterally of the carriage on itstracks. The collars 11, being adj ustably connected to the axles 3, maybe moved laterally on the axles to any desired tixed position, therebytaking up lost motion occasioned by the wear of the trucks, tracks, andother parts. This method of taking up the wear by means 10, engaging inan annular groove, 26, cut in sleeve 12, for laterally moving the axlesin theirjom-nal-boxes. This modification is not as good as the screw andthread, as it is liable to fill with dust, and the frictional wearcauses more lost motion; but this will work comparatively well becauseof the take-up allowed by the collars 11.

I do not herein claim, broadly, the combination, in a saw-mill carriage,of the supporting wheels and axles, the log-supporting frame laterallyadjustable thereon with reference to the line of travel of saidcarriage, screws mounted upon the axles and working ininternally-screw-threaded boxes, which are secured to said frame, andmechanism for operating said screws.

I claim 1. The combination, with a saw-carriage and its axles, of anendless driving-rope for moving the carriage back and forth, thescrew-andnut mechanism on the axle, the shitting-rod. and the crank-armconnected therewith and with the screw-and nut mechanism, substantiallyas described.

2. The combination of a saw-mill carriage mounted upon axles by movingbearings rig idlysecured to the frame-work ot" the carriage,ot'thedriving-rope, theshitting-rod, thespring attached to the rope androd, the slidable collar, the screw-and-nut mechanism on the axle, andthe crank-arm connected with the shifting-rod and the screw-and-nutmechanism, substantially as described.

3. The combination, with a saw-mill car riage audits axles, of theendless carrier, the shil'tingrod, the screw-and-nut mechanism on theaxle, connections between the shifting-rod and the screw-and-nutmechanism, and the adjustable collars 11 on the axle for taking up lostmotion, substantially as described.

4. The combination, with a laterally-movablc saw-mill carriage, thedriving-rope, the shiftingrod, a laterally-moving power device on theaxle, the crank-arm 12, and a connection between said crank-arm andshifting-rod,

ot' the adjustable collars 11 is a very important substantially asdescribed.

improvement, as it prevents lost motion, and

In testimony whercot I have hereunto set hencea unil'ormityol' cuttingis secured by the my hand this lst day of November, 1886. adjustment. I

In Fig. 5 I have shown a camsleeve, 12, with a cam upon one of itsfaces, and one of the adjustable collarsllprovided with a counterpartcam-extension, and a lug, 25, on arm I SAMUEL 1%. SMITH. \Vitnesses:

.E. G. \VooD, ROBERT ZAHNER.

